Engine

Trans

Color

Grey/Orange

Highlights

Frame no. T120024634

Jim Hiddleston meticulous restoration

First year for the Bonneville

Frame no. T120024634

Jim Hiddleston meticulous restoration

First year for the Bonneville

This first-year, 4-speed 1959 Triumph Bonneville T120 650cc parallel-twin features the popular “Pearl Grey and Tangerine” paint scheme. Upon its introduction, the 1959 Bonneville instantly became among the fastest motorcycles you could buy and ride off the lot. The T120 was supposed to implicate a 120 MPH top speed (road tests of the time had stock examples topping out at 108 MPH). This was the only year with no letter designation after the T120. A beautiful machine like the Thunderbird, the 1959 Bonneville’s headlight nacelle and full fenders did not immediately resonate with American buyers, who sought slightly more minimal bikes. The Bonneville featured an upgraded Tiger T110 650cc twin that was fed by two Amal Monobloc carburetors (no air filters). The added power from the twin Amals and other mods boosted the Bonneville’s horsepower to 46 HP. The 1959 Bonneville T120 used the same frames as the 1959 Tiger T110 models. While the 1959 frames suffered some flex from the increased power, the “duplex frame” on later models was a whole other story. A 5-quart oil tank sits right, balanced by the battery and toolbox on the left in Pearl Grey. The oil tank had a decal to indicate proper oil level, and the toolbox had a small gold “Bonneville 120” decal on it. The all-steel, welded tank held four Imperial gallons for the domestic and most export markets, though the U.S. got a smaller three Imperial-gallon unit. The top of the tank is Pearl Grey over Tangerine, separated by chrome trim, rubber knee pads, gold pinstriping and the oversized Triumph tank badge. This 1959 Bonneville T120 example, sporting Frame No. T120024634, is a meticulous Jim Hiddleston restoration from the man who has a hard-earned reputation for incredibly accurate Triumph bikes.

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Information found on the website is presented as advance information for the auction lot. Photos, materials for videos, descriptions and other information are provided by the consignor/seller and is deemed reliable, but Mecum Auction does not verify, warrant or guarantee this information. The lot and information presented at auction on the auction block supersedes any previous descriptions or information. Mecum is not responsible for information that may be changed or updated prior to the auction. The decision to purchase should be based solely on the buyers personal inspection of the lot at the auction site prior to the auction.